Mobile builder <= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation to wcfm-profile-settings REST Route 'key'/'data' Parameters
Summary
| CVE | CVE-2026-104799 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-04 12:17:05 UTC |
| Updated | 2026-11-04 12:17:05 UTC |
| Description | The Mobile builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.4.2 via the `wcfmmp_profile_settings()` REST handler exposed at `POST /mobile-builder/v1/wcfm-profile-settings`. This is due to a PHP loose-comparison logic flaw in the meta key allow-list check — `strpos( $key, 'mobile_builder' ) == 0` evaluates to `true` for any key that does *not* contain the substring `'mobile_builder'` because `strpos()` returns `false` on no match and `false == 0` is `true` in PHP — combined with a `permission_callback` (`user_permissions_check`) that grants access to any authenticated user by only verifying `$user->exists()`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to pass an unsanitized `data` array via the `key` and `data` parameters directly to `update_user_meta()`, overwriting arbitrary user meta on their own account — including the `wp_capabilities` meta key — to grant themselves Administrator-level privileges. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-269 | CWE-269 CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Rnlab | Mobile Builder | affected 1.4.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/bc1a233e-ea62-4fb0-98eb-6b2aa... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: sermsak (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-11-03T21:31:34.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.